Stable sine wave generator

Details Stable sine wave generator Stable sine wave generator

1983-06-14

1986-04-22

Thomas, James D.

Boots, shoes, and leggings

G06F 102

Patent

active

045846588

ABSTRACT:
A sine wave generator which utilizes a PROM for storing a predetermined bit pattern which is converted to a corresponding pulse waveform generated in response to a very accurate and stable clock pulse. The pulse waveform is shifted to a very exacting voltage level and is filtered by a band-pass filter to derive the desired fundamental frequency sine wave. The amplitude and frequency stable sine wave may be utilized in linear variable differential transformer (LVDT) apparatus for measuring the position of a controlled object such as a turbine valve. The arrangement may also be utilized for generating additional sine waves bearing some predetermined phase relationship with respect to one another for other control or signal processing applications.

REFERENCES:
patent: 3657657 (1972-04-01), Jefferson
patent: 3763364 (1973-10-01), Deutsch et al.
patent: 4039806 (1977-08-01), Fredriksson et al.
patent: 4078192 (1978-03-01), Fultz
patent: 4105939 (1978-08-01), Culbertson
patent: 4192007 (1980-03-01), Becker
patent: 4225936 (1980-09-01), Lesche
patent: 4348734 (1982-09-01), Dougherty
patent: 4484296 (1984-11-01), Treise et al.

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